update cabal-version constraint
update cabal-version constraint

Ignore-this: 8afa55b6e44d52192aca8b1c94e59b4a

The syntax 'base == 4.*' requires cabal version 1.6 or later.

darcs-hash:20090717160255-b47d3-1ea8d54339e500897925ccd5fc60b37769f4e12f

bergmark/time